http://harrypotter.wikia.com/wiki/Ronald_Weasley

Ronald Bilius Weasley is one of the best friends to Harry Potter, always there when Harry needed him(except for in the 1st event of the Triwizard Tournament). He would sometimes get a little jealous of Harry because of his fame, but other times the pair were inseparable. Born as a Pure Blood wizard, he was always over shined by his five older brother, Bill, Charlie, Percy, Fred, and George. He met Harry on the Hogwarts Express and they instantly became friends. Hermione, on the other hand, Ron thought was a insufferable know-it-all, but he and Hermione managed to get along when Ron saved Hermione from a troll in the Girl’s bathroom. He was sorted into Gryffindor with Harry and Hermione. As a good chess player, in their first year, Ron sacrificed himself for Harry and Hermione to continue to stop Quirrel. The second year of Hogwarts, Ron had to go into the Chamber of Secrets with. In his third year Ron broke his leg when he was dragged into the Whomping Willow by Sirius. He found out that his rat Scabbers, was actually a human, Peter Petigrew. In his fourth year, he realized he had a soft spot for Hermione when she started dating a famous Quidditch player. While searching Horcruxes, Ron got mad and left the group for a few days. After, he came back, he fought along side Dumbledore’s Army. In the war, Ron lost his twin brother, Fred in a terrible explosion caused by a Death Eater. After winning the war, Ron and Hermione got married and had two kids, Rose and Hugo. Harry also became Ron’s brother-in-law when he married Ginny.